Email delivery for web apps.
https://postmarkapp.com
Email Hosting Providers · Transactional Email
Get access to data on 275,547 websites that are Postmark Customers. We know of 210,069 live websites using Postmark and an additional 65,478 sites that used Postmark historically and 91,691 websites in the United States.
Get a list of 275,547 websites using Postmark which includes location information, hosting data, contact details, 210,069 currently live websites and an additional 396,841 domains that redirect to sites in this list. 65,478 sites that used this technology previouslyand 91,691 websites in the United States currently using Postmark.
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These are sites that we think might use Postmark in the future because of their similarity to other sites that already do.